BioSono provides a cyberspace (www.biosono.com) where researchers, engineers, and students can find useful reference and educational materials, conduct acoustic simulation, post questions on design and development, and get answers. The online KLM based transducer acoustic stack simulation, which is currently free, can help you choose piezoelectric, matching and backing material, and a tuning electrical network. The output from the model includes electrical transmit impedance, acoustic receive impedance, and the impulse or pulse-echo response. The ultrasound beam profile simulation provides the calculated transmitted ultrasound pressure field under certain excitation for a given transducer aperture in a number of different geometrical configurations, including circular elements (flat and concave piston), rectangular elements, linear arrays, convex arrays, and 2D arrays. The simulation is based on Field II, which is a free program that utilizes the spatial impulse response method, and has been validated by many researchers for accuracy. In addition to the web based acoustic simulation, we also provide pulse-echo system, transducers, and customized design and develop services.

Free Beam Profile Simulation Select An Aperture Flat Piston Concave Piston Linear Array Phase Array Convex Linear Array 2D Rectangle Array Select An Excitation One-cycle burst Ten-cycle burst 10% Bandwidth Gaussian Pulse 50% Bandwidth Gaussian Pulse 80% Bandwidth Gaussian Pulse Select a View X-Y X-Z Y-Z X-Y & X-Z X-Y & Y-Z X-Z & Y-Z X-Y & X-Z & Y-Z Frequency: MHz Diameter: mm Electric Focus: mm (Lateral Elevation Axial) Total Element Number Curvature Radius: mm Kerf Size: mm Element Width: mm Element Height: mm Sub-element Number in Lateral Sub-element Number in Elevation 2D Array: Aperture Widt:mm 2D Array: Aperture Height: mm 2D Array: Total Element Number in Lateral 2D Array: Total Element Number in Elevation Input the Acoustic View Parameters: Start  Step   Stop Axial: mm Lateral: mm Elevation: mm The ultrasound beam profile simulation service is free to all users. Select an aperture, input your desired parameters, choose an electrical excitation, set the range parameters for the view, and click the "Submit" button, the simulation will be triggered automatically. It is time consuming, and depends on how many tasks in front of you. The results will be sent to you through email automatically by server. Currently, the services include flat piston, concave piston, linear array, phase array, convex linear array, and 2D array aperture. The results is 2D acoustic intensity distribution in bitmap file format. For more apertures or more results formats, you may submit a customized simulation. The view is the area in front of the aperture of the ultrasound transducer in the ultrasound beam simulation. The program will calculate point by point of acoustic pressure in the view field to cover your interested area. So it is important for your to specify where to start, stop and by what step. As shown in the view picture, the Axial direction is perpendicular to the transducer. The Lateral direction is the array direction, and the elevation direction is perpendicular to the Axial-Lateral plane. The origin of the coordinates (0,0,0) is the ultrasound transducer surface center.                 Email: contact@biosono.com

1D Beam Profile Flat piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Depth:15mm. Flat piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Depth:29mm. Flat piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Depth:39mm. Flat piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 4-cycle burst,Depth:29mm. Flat piston, 5MHz, 6mm-diameter ,Bandwidth:40%, Excitation: 1-cycle burst,Depth:29mm. Flat piston, 5MHz, 3mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Depth:29mm. Flat piston, 10MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Depth:29mm. Flat piston, 2.5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Depth:29mm. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Focus:5mm,Depth:5mm. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Focus:5mm,Depth:8mm. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Focus:18mm,Depth:18mm. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst,Focus:18mm,Depth:25mm. 2D Ultrasound Beam Profile Flat piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral. Flat piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 4-cycle burst Axial-Lateral. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 4-cycle burst Axial-Lateral. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral Axial-Elevation. Concave piston, 5MHz, 6mm-diameter ,Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral Axial-Elevation Lateral-Elevation. Linear Array, 5MHz, Bandwidth:80%, Excitation: 1-cycle burst, 64-element,0.5Lmda pitch, Focus 000015mm Axial-Lateral . Linear Array, 5MHz, Bandwidth:80%, Excitation: 1-cycle burst, 64-element,0.5Lmda pitch, Focus -80015mm Axial-Lateral . Linear Array, 5MHz, Bandwidth:80%, Excitation: 1-cycle burst, 64-element,0.5Lmda pitch, Focus -80015mm Axial-Lateral Lateral-Elevation. 2D Ultrasound Pulse Propagation in Amplitude Concave piston, 5MHz, 6mm-diameter, focus: 10mm, Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral. Concave piston, 5MHz, 6mm-diameter, focus: 10mm, Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral Axial-Elevation. Phase Array, 5MHz, 64 element, Focus (Lateral -7mm, Axial: 15mm) ,Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral. Phase Array, 5MHz, 64 element, Focus (Lateral -7mm, Axial: 15mm) ,Bandwidth:80%, Excitation: 1-cycle burst Axial-Lateral Lateral-Elevation. Simulated Image Examples Linear Array 5MHz 32-element Linear Array 10MHz 32-element Linear Array 20MHz 32-element Linear Array 40MHz 32-element Linear Array 50MHz 32-element Phase Array 10MHz 32-element Phase Array 10MHz 62-element Itravascular ultrasound 20MHz 1mm-diameter transducer Itravascular ultrasound 40MHz 0.5mm-diameter transducer Itravascular ultrasound 50MHz 0.5 mm-diameter flat piston transducer Itravascular ultrasound 50MHz 0.5 mm-diameter transducer focus:2.5mm

Ultrasound beam profile simulation is also called ultrasound aperture radiation pattern. It is an important step in ultrasound simulation or modeling. From KLM model simulation, the acoustic output of the ultrasound transducer can be obtained under any given electrical excitation. The acoustic pressure, or particle movement on surface of the ultrasound transducer, will propagates into free space, and form a intensity field in front of it. In most cased, the transducer aperture is far bigger than the ultrasound wavelength and the intensity field has a shape similar to flashlight beam, so is called ultrasound beam. For imaging or HIFU application, a confined energy field or a narrow beam is desired which leads to a good ultrasound image resolution or beam focus. In some special cased a more uniformed beam is required. In general, a large aperture is required to achieve strong focus, and thus better resolution. A very small aperture compared to ultrasound wavelength generates a spherical like wave. The beam profile can be quantitatively studied by 1D beam intensity profile, 2D beam intensity, 2D acoustic pulse instant spatial distribution, animation of acoustic pulse propagation.

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